Local testing decision
Radon Testing in Shoshone County, ID
Shoshone County should be treated as a high-priority testing market because 63.0% of reported tests at or above 4.0 pCi/L, 10.6 pCi/L primary measured result, and 102.9 pCi/L high-end signal in CDC Tracking Network data. A missing home reading means test now; a 4.0+ result means mitigation pricing or seller-credit math should start.
Direct answer
Shoshone County crosses the action threshold in the official county data.
Shoshone County should be treated as a county where a first test is urgent and a 4.0+ result should move directly into mitigation pricing or seller-credit math.
Evidence
National tracking data
Primary signal
10.6 pCi/L
Reported tests
57 over 10 years
What this evidence can and cannot tell you
Shoshone County, ID has more than the EPA map: CDC Tracking Network exposes 57 reported tests, 10.6 pCi/L county average, 5.7 pCi/L median, 63.0% of reported tests at or above 4.0 pCi/L, and 102.9 pCi/L high-end signal for 2008-2017.
Shoshone County, ID is measurement-backed for 2008-2017. The measured average is 10.6 pCi/L, and 63.0% of reported results are at or above 4.0 pCi/L. The high-end signal reaches 102.9 pCi/L.
Your next test decision
No reading yet: run a short-term test now, then confirm or price mitigation quickly if the result is elevated.
Retest trigger: a 2.0-3.9 pCi/L home result should be confirmed here because 10.6 pCi/L average, 5.7 pCi/L median, and 63.0% of reported tests at or above 4.0 keeps the county from being a dismiss-it signal.
Move from a test result to a local plan
Use the result band, foundation type, and county cost range together. A county signal is context; the home's own test controls the decision.
Sources